热加工工艺
熱加工工藝
열가공공예
HOT WORKING TECHNOLOGY
2010年
2期
100-103
,共4页
表面完整性%耐腐蚀性%电火花表面强化%喷丸强化
錶麵完整性%耐腐蝕性%電火花錶麵彊化%噴汍彊化
표면완정성%내부식성%전화화표면강화%분환강화
surface integrality%corrosion resistance%electrical discharge strengthening%shot peening
采用电火花表面强化和喷丸强化两种表面强化方法改变40Cr钢的表面完整性,用盐雾腐蚀试验和阳极极化试验评定了试样的耐磨性.结果表明.两种表面强化方法改善了试样的表层显微组织并且产生了残余应力和裂纹缺陷.喷丸强化使耐腐蚀性降低.电火花表面强化使耐腐蚀性大大提高;电火花表面强化试样的耐腐蚀性明显高于加工、喷丸强化试样的耐腐蚀性.
採用電火花錶麵彊化和噴汍彊化兩種錶麵彊化方法改變40Cr鋼的錶麵完整性,用鹽霧腐蝕試驗和暘極極化試驗評定瞭試樣的耐磨性.結果錶明.兩種錶麵彊化方法改善瞭試樣的錶層顯微組織併且產生瞭殘餘應力和裂紋缺陷.噴汍彊化使耐腐蝕性降低.電火花錶麵彊化使耐腐蝕性大大提高;電火花錶麵彊化試樣的耐腐蝕性明顯高于加工、噴汍彊化試樣的耐腐蝕性.
채용전화화표면강화화분환강화량충표면강화방법개변40Cr강적표면완정성,용염무부식시험화양겁겁화시험평정료시양적내마성.결과표명.량충표면강화방법개선료시양적표층현미조직병차산생료잔여응력화렬문결함.분환강화사내부식성강저.전화화표면강화사내부식성대대제고;전화화표면강화시양적내부식성명현고우가공、분환강화시양적내부식성.
The changes of surface integrality caused by electrical discharge strengthening and shot peening were investigated and their influences on corrosion resistance of 40Cr steel were determined.Corrosion resistance of specimens Was evaluated by 500 h salt spray testing on normal atmospheric temperature and by electrochemical performance.The results show that the microscopic structure of the specimens'surface improves;the residual sffess and microscopic crack are created after electrical discharge strengthening and shot peening on 40Cr steel.The corrosion resistance ofthe shot-peened specimensis lower than the corresponding corrosion resistance of the unstrengthened specimens and the corrosion resistance of the electrical discharge strengthened specimens is obviously higher than that of the unstrengthened specimens and the shot-peened specimens.
